As you should all know by now, we've got a bunch of exclusive premieres to look forward to at this Sunday's 2009 MTV Movie Awards, starting at 9pm EST. New clips from "Harry Potter and the Half-Blood Prince" and "Transformers: Revenge of the Fallen." And of course, the trailer debut of "Twilight" follow-up "New Moon."

As an added bonus for those who tune in to the Movie Awards pre-show, we'll also be running a brand-new clip from "G.I. Joe: The Rise of Cobra." The pre-show starts at 7pm EST, so make sure you tune in or set your DVRs. We've even got you covered if you happen to miss it; the full clip will be viewable online after the pre-show ends. To tide you all over for now, we offer you this tantalizing glimpse of what's to come on Sunday.